Attachment for cutter-bar sharpeners.



No. 759,746 PATENTED MAY 10, 1904. 'W. M. PNE'UMAN.

ATTACHMENT FOR GUTTER BAR SHARPENERS.

APPLICATION FILED 00:213. 1903.

N0 MODEL.

INVENTOH WITNESSE I 0vm WJZl /mahwuv Q M 1/5 W BY A TTOHNE YS UNITED STATES Patented May 10, 1904.

WVILLIAM MILTON PNEUMAN, OF MESHOPPEN, PENNSYLVANIA.

ATTACHMENT FOR CUTTER-BAR SHARPENERS.

SPECIFICATION forming part of Letters Patent N0.'759,746, dated May 10, 1904.

Application filed October 13, 1903. Serial No. 176,865. (No model.)

To all whom, it 71111.7 concern.-

Be it known that I, WILLIAM MILTON PNEU- MAN, a citizen of the United States, residing at Meshoppen, in the county of Wyoming and State of Pennsylvania, have invented a new and Improved Attachment for Cutter-Bar Sharpeners, of which the following is a specification.

This invention relates to thattype of cutterbar Sharpeners employing a grinding-wheel operated through speeding -gears manually and mechanically and which are adapted for automatic adjustment of the grinding-wheel to and from working position.

The invention consists, in general terms, of an attachment whereby the grinding-wheel may be gaged in its work. The particular type of cutter-bar sharpener to which my gage attachment is adapted employs a rotatable grinder at the "free end of an oscillating arm. In sharpening cutter-bars with a device of the character stated the grinder-is liable to cut away the blade injuriously, and much care is necessary to prevent grinding entirely through the bar or blade. My attachment is designed to obviate all such objections and has the further advantage of adjustability, whereby it may be set according to the more or less sharpening required.

With the above statement of the use and advantage residing in my invention I will now proceed to describe it in detail with reference to the accompanying drawings and the char acters of reference indicated. thereon.

In the drawings, Figure 1 is a detail perspective view of a common form of cutter-bar sharpener, showing my attachment applied thereto, the grinder being illustrated elevated or out of sharpening position and the supporting-base of the sharpener part broken away. Fig. 2 is a side elevation of the parts illustrated in Fig. 1. In this view the grinder is shown lowered to sharpening position and held against injuriously grinding away the blade and cutting through the cutter-bar.

In the preferred embodiment of my invention I employ a suitable standard A, having fixed or detachable support on the oscillating arm B.

C denotes an arm projectinglaterally from and having adjustment on the standard A. The

lation with the gear-wheel K, (not shown,), whose teeth mesh with the teeth on the gear wheel M.

N denotes any suitable cutter-bar support having pivotal connection at 1 t0 the sharpener-base. The support N is yieldingly held by a spring 2, having one end fixed thereto and its other end secured to any suitable part of the base.

The cutter-bar being arranged on its support N, as shown, the grinding-wheel E is imparted rapid rotation through the gearing above referred to by power applied to the crank O or other means adapted therefor.

It is well understood that in the type of cutter-bar sharpener illustrated by my drawings the grinding-wheel has an up-and-down movement and that at the end of both adjustments there is a movement of rest or non-movement of the oscillating arm B eflected through means of the loop F and the cam Ur within the loop.

In this type of cutter-har sharpeners the gearing is timed in its driving oi? the grindingwheel, adapted torimparting several rotations thereto at the end of each up-and-down ad justment of the oscillating arm B.

When the grinding-wheel is at its lowermost position, much care is necessary to prevent inj urious or imperfect sharpening of the cutter-bar blades and liability of grinding into or through the cutterbar.

My attachment is designed for obviating the above-mentioned objections, and its use will be understood, since it is apparent that by simple adjustment of the arm C on the stand,- ard E the said arm may be set for contacting the nose of the cutter-bar support N during the downward stroke or adjustment of .the grinding-wheel, as indicated in Fig. 2, and upon its continued downward movement effect swinging action of the support N on its pivot 1, and thereby shove the cutter-bar blade away from the grinder E. It is apparent that upon upward stroke of the grinder E the spring 2 Will restore the support N to position for sharpening action on the cutter-bar blades upon the next return stroke of the grinder.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent. is

1. The combination with a cutter-bar sharpener, of ayielding cutter-bar support, an oscillating arm, a rotatable sharpener on the oscillating arm, a standard on the said oscillating arm, and an adjustable laterally-disposed arm on the said standard, substantially as described.

2. The combination in a cutter-bar sharpener, of an oscillating arm, a sharpening device at the free end of the oscillating arm, mechanism adapted in operation, for effecting intermittent movement of the said arm, mechanism imparting continuous operation of the said sharpening device, and means whereby sharpening action is arrested, during operation of the cutter-bar sharpener, substantially as described.

3. The combination in a cutter-bar sharpener, of an oscillating arm, a rotating grinder at the free end of the oscillating arm, means imparting continuous rotation to the said grinder, means imparting intermittent movement to the said arm, and means whereby action of the grinder is arrested, during operation of the cutter-bar sharpener, substantially as described.

4. The combination in a cutter-bar sharpener, of an oscillating arm, a rotatable sharpener device at the free end of the oscillating arms, means imparting continuous rotation to the sharpener device, means imparting intermittent movement to the said arnj, a yielding support for the cutter-bar, and means whereby sharpening action of the said rotatable device is arrested, during operation of the cutter-barsharpener, substantially as described.

WILLtiM MILTON PNEUMAN.

l/Vitnesses: 7

E. C. PRATT, J. W. PNEUMAN. 

